Web page programing

 Amend (your copy of) example.html from chapter 4, along with the associated js and css files to allow for a range of numbers (1 - 20), math operator (+,-,*,/) and base number.   You will need to use the appropriate control to get the input and then display the data in a chalkboard.  You may use a chalkboard sized to hold a maximum of 20 numbers, though extra credit will be given for a chalkboard that adjusts to the size of numbers.   Extra credit will also be given for creativity in inputting the three values.